#nullable enable
using System;
using System.Collections.Generic;
using Cysharp.Threading.Tasks;
using ShrinkCommand;
using ShrinkContext;
using ShrinkNetwork;

namespace ShrinkCommand.Integration
{
    /// <summary>
    /// 命令-网络集成组件（论文 6.5 集成组件模式）：
    /// 核心（command / network）互不依赖，本组件注入双方服务键，全部就绪才激活，
    /// 任一提供者退役即自动停用——依赖接线由响应式余效应结构性完成，替代手工桥接编排。
    ///
    /// 已知边界：ShrinkNetworkService 当前无 handler 注销 API，停用不撤销已注册的
    /// command/execute 处理器（传输解绑后不可达；网络服务实例重建时自然消失）。
    /// </summary>
    public sealed class ShrinkCommandNetworkIntegrationComponent : IShrinkComponent
    {
        /// <summary>与 ShrinkNetworkAppComponent.ServiceKey 保持一致（避免跨包硬引用）。</summary>
        public const string NetworkServiceKey = "shrink.service.network";

        public const string CommandServiceKey = "shrink.service.command";
        public const string ProvideKey = "shrink.integration.command-network";

        private static readonly string[] InjectKeys = { CommandServiceKey, NetworkServiceKey };
        private static readonly string[] ProvideKeys = { ProvideKey };

        public string Name => "shrink.integration.command-network";

        public IReadOnlyList<string> Inject => InjectKeys;

        public IReadOnlyList<string> Provide => ProvideKeys;

        public UniTask ApplyAsync(ShrinkCtx ctx, object? config)
        {
            var commandService = ctx.Get<ShrinkCommandService>(CommandServiceKey);
            var networkService = ctx.Get<ShrinkNetworkService>(NetworkServiceKey);
            var options = config as ShrinkNetworkCommandBridgeOptions;

            ShrinkNetworkCommandBridge.RegisterService(networkService, commandService, options);
            ctx.Set(ProvideKey, ShrinkNetworkCommandBridge.ExecuteRoute);

            // 桥注册按网络服务实例幂等去重；可逆面为集成键的发布/撤回
            return UniTask.CompletedTask;
        }
    }
}